题目

下图表示某家族色盲遗传系谱图，下列有关叙述错误的是 A．Ⅲ7的色盲基因肯定来自I3 B．I2的基因型是XBXb，I4的基因型是XBXB或XBXb C．Ⅱ6的色盲基因与正常基因的分离发生在减数第一次分裂过程中 D．基因型为XBXb的女性与Ⅲ7结婚，Ⅲ7将色盲基因传给儿子的概率是50％ 答案：D完成对话，通读对话，根据上下文补全对话内容A: Hi, Linda. Are you free tomorrow evening?B: 1. A: Why not go to the movies?B: 2._I like seeing movies very much.A: 3. _B: Well, I like comedies because they are funny.What about you?A: I like them, too. I hear Mr. Bean is on. 4. __B: Sure. Let’s meet at seven o’clock tomorrow evening.A: Oh, it’s a little earlier.B: 5._A: OK. See you at half past seven.B: See you.